ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C4H4N2OS/c7-4-5-2-1-3%288%296-4/h1-2H%2C%28H2%2C5%2C6%2C7%2C8%29/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/C4H4N2OS/c7-4-5-2-1-3%288%296-4/h1-2H%2C%28H2%2C5%2C6%2C7%2C8%29 could not be loaded.